CVE-2024-44966 Information

Description

In the Linux kernel the following vulnerability has been resolved:

binfmt_flat: Fix corruption when not offsetting data start

Commit 04d82a6d0881 (infmt_flat: allow not offsetting data start) introduced a RISC-V specific variant of the FLAT format which does not allocate any space for the (obsolete) array of shared library pointers. However it did not disable the code which initializes the array resulting in the corruption of sizeof(long) bytes before the DATA segment generally the end of the TEXT segment.

Introduce MAX_SHARED_LIBS_UPDATE which depends on the state of CONFIG_BINFMT_FLAT_NO_DATA_START_OFFSET to guard the initialization of the shared library pointer region so that it will only be initialized if space is reserved for it.

Reference

https://git.kernel.org/stable/c/3a684499261d0f7ed5ee72793025c88c2276809c https://git.kernel.org/stable/c/af65d5383854cc3f172a7d0843b628758bf462c8 https://git.kernel.org/stable/c/49df34d2b7da9e57c839555a2f7877291ce45ad1 https://git.kernel.org/stable/c/9350ba06ee61db392c486716ac68ecc20e030f7c https://git.kernel.org/stable/c/3eb3cd5992f7a0c37edc8d05b4c38c98758d8671